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Java > Open Source Codes > com > caucho > xsl > java > XslVariable


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.xsl.java;
30
31 import com.caucho.java.JavaWriter;
32 import com.caucho.xml.QName;
33 import com.caucho.xsl.XslParseException;
34
35 /**
36  * Sets an xsl variable.
37  */
38 public class XslVariable extends XslNode implements XslTopNode {
39   private String JavaDoc _name;
40   private String JavaDoc _select;
41
42   private boolean _isGlobal;
43
44   /**
45    * Returns the tag name.
46    */
47   public String JavaDoc getTagName()
48   {
49     return "xsl:variable";
50   }
51
52   /**
53    * Set true for global param.
54    */
55   public void setGlobal(boolean isGlobal)
56   {
57     _isGlobal = true;
58   }
59
60   /**
61    * Adds an attribute.
62    */
63   public void addAttribute(QName name, String JavaDoc value)
64     throws XslParseException
65   {
66     if (name.getName().equals("name"))
67       _name = value;
68     else if (name.getName().equals("select"))
69       _select = value;
70     else
71       super.addAttribute(name, value);
72   }
73
74   /**
75    * Ends the attributes.
76    */
77   public void endAttributes()
78     throws XslParseException
79   {
80     if (_name == null)
81       throw error(L.l("'name' is a required attribute of <xsl:variable>"));
82   }
83
84   /**
85    * Ends the element.
86    */
87   public void endElement()
88   {
89     addVariableCount();
90   }
91
92   /**
93    * Generates the code for the tag
94    *
95    * @param out the output writer for the generated java.
96    */
97   public void generate(JavaWriter out)
98     throws Exception JavaDoc
99   {
100     if (_select != null) {
101       int index = addExpr(_select);
102
103       if (_isGlobal) {
104     out.print("env.setGlobal(\"" + _name + "\", ");
105     out.print("_exprs[" + index + "].evalObject(node, env));");
106       }
107       else {
108     out.print("_exprs[" + index + "]");
109       
110     out.println(".addVar(env, \"" + _name + "\", node, env);");
111       }
112     }
113     else {
114       String JavaDoc id = "frag" + _gen.generateId();
115       
116       out.println("XMLWriter " + id + " = out.pushFragment();");
117
118       generateChildren(out);
119       
120       if (_isGlobal)
121     out.print("env.setGlobal(\"");
122       else
123     out.print("env.addVar(\"");
124       
125       out.printJavaString(_name);
126       out.println("\", out.popFragment(" + id + "));");
127     }
128     /*
129     boolean isDisabled = disable.equals("yes");
130     if (isDisabled)
131       startDisableEscaping();
132     */
133
134     // printStringExpr(out, _select);
135
136     /*
137     if (isDisabled)
138       endDisableEscaping();
139     */
140   }
141
142   protected void printPopScope(JavaWriter out)
143     throws Exception JavaDoc
144   {
145   }
146 }
147
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